/*

===== IMPORTANT =====

This is sample code demonstrating API, technology or techniques in development.
Although this sample code has been reviewed for technical accuracy, it is not
final. Apple is supplying this information to help you plan for the adoption of
the technologies and programming interfaces described herein. This information
is subject to change, and software implemented based on this sample code should
be tested with final operating system software and final documentation. Newer
versions of this sample code may be provided with future seeds of the API or
technology. For information about updates to this and other developer
documentation, view the New & Updated sidebars in subsequent documentation
seeds.

=====================

File: EAGLView.h
Abstract: Convenience class that wraps the CAEAGLLayer from CoreAnimation into a
UIView subclass.

Version: 1.3

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*/

// Only compile this code on iOS. These files should NOT be included on your Mac project.
// But in case they are included, it won't be compiled.
#import <Availability.h>
#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED

#import <UIKit/UIKit.h>
#import <OpenGLES/EAGL.h>
#import <OpenGLES/EAGLDrawable.h>
#import <OpenGLES/ES1/gl.h>
#import <OpenGLES/ES1/glext.h>

#import "ESRenderer.h"

//CLASSES:

@class EAGLView;
@class EAGLSharegroup;

//PROTOCOLS:

@protocol EAGLTouchDelegate <NSObject>
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event;
@end

//CLASS INTERFACE:

/** EAGLView Class.
 * This class wraps the CAEAGLLayer from CoreAnimation into a convenient UIView subclass.
 * The view content is basically an EAGL surface you render your OpenGL scene into.
 * Note that setting the view non-opaque will only work if the EAGL surface has an alpha channel.
 */
@interface EAGLView : UIView
{
    id<ESRenderer>			renderer_;	
	EAGLContext				*context_; // weak ref

	NSString				*pixelformat_;
	GLuint					depthFormat_;
	BOOL					preserveBackbuffer_;

	CGSize					size_;
	BOOL					discardFramebufferSupported_;
	id<EAGLTouchDelegate>   touchDelegate_;

	//fsaa addition
	BOOL					multisampling_;
	unsigned int			requestedSamples_;
}

/** creates an initializes an EAGLView with a frame and 0-bit depth buffer, and a RGB565 color buffer. */
+ (id) viewWithFrame:(CGRect)frame;
/** creates an initializes an EAGLView with a frame, a color buffer format, and 0-bit depth buffer. */
+ (id) viewWithFrame:(CGRect)frame pixelFormat:(NSString*)format;
/** creates an initializes an EAGLView with a frame, a color buffer format, and a depth buffer. */
+ (id) viewWithFrame:(CGRect)frame pixelFormat:(NSString*)format depthFormat:(GLuint)depth;
/** creates an initializes an EAGLView with a frame, a color buffer format, a depth buffer format, a sharegroup, and multisamping */
+ (id) viewWithFrame:(CGRect)frame pixelFormat:(NSString*)format depthFormat:(GLuint)depth preserveBackbuffer:(BOOL)retained sharegroup:(EAGLSharegroup*)sharegroup multiSampling:(BOOL)multisampling numberOfSamples:(unsigned int)samples;

/** Initializes an EAGLView with a frame and 0-bit depth buffer, and a RGB565 color buffer */
- (id) initWithFrame:(CGRect)frame; //These also set the current context
/** Initializes an EAGLView with a frame, a color buffer format, and 0-bit depth buffer */
- (id) initWithFrame:(CGRect)frame pixelFormat:(NSString*)format;
/** Initializes an EAGLView with a frame, a color buffer format, a depth buffer format, a sharegroup and multisampling support */
- (id) initWithFrame:(CGRect)frame pixelFormat:(NSString*)format depthFormat:(GLuint)depth preserveBackbuffer:(BOOL)retained sharegroup:(EAGLSharegroup*)sharegroup multiSampling:(BOOL)sampling numberOfSamples:(unsigned int)nSamples;

/** pixel format: it could be RGBA8 (32-bit) or RGB565 (16-bit) */
@property(nonatomic,readonly) NSString* pixelFormat;
/** depth format of the render buffer: 0, 16 or 24 bits*/
@property(nonatomic,readonly) GLuint depthFormat;

/** returns surface size in pixels */
@property(nonatomic,readonly) CGSize surfaceSize;

/** OpenGL context */
@property(nonatomic,readonly) EAGLContext *context;

@property(nonatomic,readwrite) BOOL multiSampling;

/** touch delegate */
@property(nonatomic,readwrite,assign) id<EAGLTouchDelegate> touchDelegate;

/** EAGLView uses double-buffer. This method swaps the buffers */
-(void) swapBuffers;

- (CGPoint) convertPointFromViewToSurface:(CGPoint)point;
- (CGRect) convertRectFromViewToSurface:(CGRect)rect;
@end

#endif // __IPHONE_OS_VERSION_MAX_ALLOWED